Seat-post for bicycles.



No. 660,285. Patented Oct. 23, |900.

J. B. wem. y SEAT POST FUR BICYCLES.

(No-maal.)

TME Nbnms Prrsns co., Mofo-LITRO.. wnsmumcd, D. c.

JOHN B. WEIR,

NITED STATES PATENT OFFICE.

OF. CHICAGO, ILLINOIS, ASS'IGNOR, BY MESNE ASSIGNMENTS,

TO THOMAS A. BANNING, OF SAME PLACE.

SEAT-POST son BICYCLES.

SPECIFICATION forming part of Letters Patent No. 660,285, dated October 23, 1900. Application tiled September 9, 1899. Serial No. 729,908. KNO model.)

To a/ZZ whom zit may concern:

Be it known that I, JOHN B. WEIR, a citizen of the United States, residing at Chicago, Illinois, have invented certain new and useful `Improvements in Seat-Posts for Bicycles, of

which the following is a specification.

My invention relates more particularly to that class of seat-posts which are used in connection with bicycles of the safety or reario driven type, a type of bicycle in which there from its position, as will more fully herein-ll after appear.

The principal object of my inventionis to provide a simple, economical, and efficient 2o seat-post for bicycles formed of two wedges,

to one of which is pivoted the seat-post lever by which the post is held in position or removed therefrom; and the invention consists in the features, combinations, and details z 5 of construction hereinafter described and claimed.

In the accompanying drawings, Figure lis a broken elevation of a portion of a bicycleframe fitted with a seat-post constructed in 3o accordance with my improvements and partly in section. Fig. 2 is a plan view of the same.

Fig. 3 is a longitudinal vertical section taken through a modified form of seat-post. Fig. Il

is a plan view of such modied seat-post, and

Fig. 5 is a side elevation of the upper end of such modified seat-post. '1

In the art to which thisinvention relates itV is well known that the seat-post formed of two plano-convex wedges is the Vbest type in the 4o art; and theobject of 'my invention is to im 5o formed of two wedges, one of which, B, is

tapered downwardly-has its large end at the seat-post on the outside.

. `topand the other of which, B', is tapered upwardlyhas its large end at the bottomand which preferably form two plano-convex wedges. -These parts maybe formed of a 5'5 tube split diagonally, as shown at b, or of two substantiallysemicylindrical wedges,` which are struck out from appropriate blanks.

To hold the saddle in position and atthc salne timefirmly secure the seat-postin'en- 6o gagement with the pillar-post of 'a bicycle, a seat-supporting lever is provided and pivotedat c to the downwardly-tapering member. This seat supporting lever is preferably formed of a tube or rod divided at its pivoted endinto two members which encircle the The upwardly-tapering member is provided with a hole, recess, or indentation c' at its back, and the encircling end of the seat-supporting lever is 7o provided with a tooth, lug, or part c2 at its end and adapted to be received in the hole, recess, orindentation in the outer face of the upwardly-tapering member. The rearwardlyextending portion C of the seat-supporting lever serves to hold the two parts of the post together, soy that they can be removed from the pillar-tube without falling apart. In assembling or putting the parts together the upwardly-tapering member is adjusted in the 8ol encircling ring ofthe rearwardly-extending portion of the seat-post lever, so that its tooth, lug, or part is received in thehole, recess, or indentation. The downwardly-taperuing member is then adjusted in position and the pin cinserted in place, which prevents the upwardly-tapering member from falling out orlbeing removed until the parts have been disassociated by the removal of the pin on which the seat-supporting lever is pivoted. 9o The encircling ring of the seat-supportingv lever is made sufficiently loose to permit the desired amount of longitudinal movement'in the two parts of the seat-post, so that their engagement or disengagement with the pillartube of the bicycle can be readily eifected. When the parts are assembled together and inserted in the pillar-tube of a bicycle, engagement with such tube is effected by bearing down on the saddle, which causes the roo two parts of the seat-post to move longitudinally in that direction, which increases their upiece or pin c2.

diameter. Wrhen it is desired to remove the saddle, all that is necessary is to lift up on the seat-supporting lever, when the parts of the post will be moved in that direction, which diminishes the diameter of the post, so thatitcan readily be removed from the pillartube.

In Figs. 3, 4, and 5 I have shown a some-` Aunderstood from an inspection of Fig. 4. This causes the hole, recess, or indentation c in the outer face of the upwardly-tapering member to assume the form of a notch, as will be particularly understood from an inspection of Fig. 3. The` tooth, lng, or part c2 at the end of the rearwardly-extending portion of the seat-supporting lever will also in the modified form simply be a cross-piece uniting the two sides of the encircling end of the seat-supporting lever c' in the rear of the upwardly-extending member of the seat-post. By giving the inner face of the ends a turn or rounded conformation, as shown in Figs. 3 and 4, the parts may be disassociated without removing the pin c. All that is necessary in this form is to move the parts of the post away from each other at the lower ends, when the upper end of the upwardly-tapering member will turn out of engagement with the It' this rounding or turning be omitted, however, the two parts can only be disassociated by removing the pin c, asin the form shown in Fig. l. y

By giving the seat-supporting lever a slight incline up or down with reference to the horizontal the rider will be enabled to adjust the angle that he prefers his saddle to keep in riding. As shown in Fig. 3, the seat-supporting lever iuclines upward from the horizontal, as shown by the dotted line. tion may be preferred by some riders.

This posihowever, a rider prefers, he can give the lever an incline downward from the horizontal, as shown by dotted line in Fig. 5, by simply removing the pin c and turning the seat-supporting lever over, thus reversing the position of its upper and lower sides. The lever will then incline downward instead of upward from the horizontal. Of course the ineline imparted to the seat-supporting lever may be varied according to the preference of the manufacturer or user.

What I regard as new, and desire to secu re by Letters Patent, is-

l. In a seat-post for bicycles, the combination ot' two tapering members forming Wedges, and a seat-supporting lever having a slotted head pivotally mounted on one mem ber of the post and exteriorly encircling the upper end of both members with its outer cross end entered into the outer face of the wall of the other member of the post, substantially as described.

2. In a seat-post for bicycles, the combination of two tapering members forming wedges, a seat-supportinglever having' a rearwardlyextending portion encircling the post, pivotally secured to one member and provided with a part entering a recess in the outer face of the other member, the inner faces at the upper ends of the two members being sufficiently separated to permit the assembling and disassembling of two ot' the parts while the seat-supportin g lever is pivotall y secu red in place, substantially as described.

3. In a seat-post for bicycles, the combination of two tapering members forming wedges, and a seat-supporting lever having a rearwardly-extending portion encircling the post and open at top and bottom and pivotally secured by a removable pin to one member and engaging the outer face of the other member and being inclined with reference to a horizontal plane so that it is reversible to change the inclination from the horizontal plane, substantially as described.

JOI-IN B. VEIR.

Witnesses:

THOMAS A. BANNING, THOMAS B. MoGREcoR. 

